Moldex Meteors Foam Earplugs

I have been buying this brand, and only this brand, of earplugs for over a decade because I am obsessed with them. They were always the best earplugs I have ever used. Recently, I bought a new box and it seems they have changed their "formula" for manufacturing. I don't know if they are using cheaper/different chemicals or what, but after a single use these earplugs make my ear canals BURN intensely now. The skin where the earplugs rub against is extremely sore and raw and it's quite painful, which has never happened in the past with this brand. There was also an intensely strong chemical smell immediately upon opening them, which never existed before. So my theory is they switched to cheaper chemicals that make my ear canals burn now and it's really unfortunate because these are my favorite earplugs and I wanted to be a lifelong customer. I have to find earplugs that are free of chemicals/irritants now...